US 12,218,550 B2
Electric machine thermal management assembly and method
Bharath Madduri, Canton, MI (US); Dengfu Zhang, Northville, MI (US); Chin-Yuan Perng, Ann Arbor, MI (US); and William Guarino, Franklin, MI (US)
Assigned to Ford Global Technologies, LLC, Dearborn, MI (US)
Filed by Ford Global Technologies, LLC, Dearborn, MI (US)
Filed on May 4, 2022, as Appl. No. 17/736,554.
Prior Publication US 2023/0361640 A1, Nov. 9, 2023
Int. Cl. H02K 1/32 (2006.01); B60L 50/51 (2019.01); H02K 5/20 (2006.01); H02K 9/19 (2006.01)
CPC H02K 1/32 (2013.01) [B60L 50/51 (2019.02); H02K 5/20 (2013.01); H02K 9/19 (2013.01); B60L 2240/425 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An electrical machine assembly, comprising: a shaft rotatable about an axis of the electrical machine;
first and second endcaps mounted to the shaft, the first endcap including a first endcap coolant channel, the second endcap including a second endcap coolant channel; and
a rotor mounted to the shaft axially between the first and second endcaps, the rotor including a plurality of first radially outer rotor coolant channels, a plurality of second radially outer rotor coolant channels, and a plurality of radially inner rotor coolant channels,
the plurality of first radially outer rotor coolant channels configured to communicate liquid coolant that is received from the first endcap coolant channel axially through the rotor in a first direction,
the plurality of second radially outer rotor coolant channels configured to communicate liquid coolant that is received from the second endcap coolant channel axially through the rotor in a second direction that is opposite the first direction,
the plurality of radially inner coolant channels each configured to communicate some of the liquid coolant axially to the first endcap coolant channel and some of the liquid coolant axially to the second endcap coolant channel wherein each of the radially inner coolant channels within the plurality of radially inner coolant channels opens to both the first endcap and the second endcap.